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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST72260G датащи(PDF) 166 Page - STMicroelectronics |
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ST72260G датащи(HTML) 166 Page - STMicroelectronics |
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166 / 171 page  Rev. 2.3 August 2003 166/171 ERRATA SHEET ST72264 LIMITATIONS AND CORRECTIONS 17 SILICON IDENTIFICATION This document refers to ST72F264 devices and subsets (ST72F260, ST72F262). They are identifiable: s On the device package, by the last letter of the Trace code marked on the device package s On the box, by the last 3 digits of the Internal Sales Type printed on the box label. Table 32. Device Identification 18 REFERENCE SPECIFICATION Limitations in this document are with reference to the ST72264 Datasheet Revision 1.7 (Au- gust 2003). 19 SILICON LIMITATIONS This section lists the known limitations of the devices referenced in Table 32. 19.1 EXECUTION OF BTJX INSTRUCTION When testing the address $FF with the "BTJT" or "BTJF" instructions, the CPU may perform an incorrect operation when the relative jump is negative and performs an address page change. To avoid this issue, including when using a C compiler, it is recommended to never use ad- dress $00FF as a variable (using the linker parameter for example). 19.2 I/O PORT B AND C CONFIGURATION When using an external quartz crystal or ceramic resonator, the fOSC2 clock may be disturbed because the device goes into reserved mode controlled by Port B and C. This happens with either one of the following configurations: Trace Code marked on device Internal Sales Type on box label Flash Devices: “xxxxxxxxxZ” 72F264xxxx$U2 72F264xxxx$A2 1 |
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